Abstract
Filtering characteristics of porous silicon carbide candle filters with high surface area were investigated. Cogwheel type silicon carbide ceramic filters consisting of a highly porous support and a filtration layer were fabricated by extrusion forming. Tube typed ceramic candle filters were also fabricated for comparison. The cogwheel type filter showed much less pressure drops than the tube typed one according to an increase of flow rate or continuous mass loading. While the cogwheel shape did not greatly affect the separation efficiency, it clearly affected the cleaning efficiency. Additionally, the cogwheel type filter showed better cleaning characteristics. It is suggested that the cogwheel shape is beneficial to decrease pressure drop and thus improves the operating performance.
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